how to get column value in grid

Question

<asp:TemplateField HeaderText="Total price">

<ItemTemplate>

<asp:Label ID="lbltotal" runat="server" Text='<%#Item.quantity*Item.price %>' ></asp:Label>

</ItemTemplate>

</asp:TemplateField>

 

 this column i want in totalbill

 

protected void grdViewItem_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

//totalbill += Convert.ToDecimal(e.Row.Cells[5].Text);

//totalbill += Convert.ToDecimal((Label)e.Row.FindControl("lbltotal"));

}

if (e.Row.RowType == DataControlRowType.Footer)

{

e.Row.Cells[4].Text = "Total Amount";

System.Globalization.CultureInfo info = System.Globalization.CultureInfo.GetCultureInfo("hi-IN");

e.Row.Cells[5].Text = totalbill.ToString("c",info);

}

}